Armature



(No Model.) 2 Sheens--Sheetl 1.

H. G. REIST.

ARMATURB.

Naosaz. Patented Dec. 3,1895.

1f HEJ '(No Model.) I 2 Sheets- Sheet 2.

H. G. RE

ARMATU Patented Dec. 3, 1895.

UNITED STATES PATENT OFFICE.

HENRY G. REIST, OF SCHENECTADY, NEV YORK, ASSIGNOR TO TI'IE GENERAL ELECTRIC COMPANY, OF NEV YORK.

ARMATURE.

SPECIFICATION forming part of Letters Patent No. 550,692, dated December 3, 1895.

Application led August 3l, 1895. Serial No. 561,084. (No model.)

To @ZZ whom t may concern:

3e it known that I, HENRY G. REIsT, a citi- Zen of the United States, residing at Schenectady, in the county of Schenectady, State of New York, have invented certain new and useful Improvements in Armatures, of which the following is a specification.

My invention relates to armatures of dynamo-electric machines, particularly of the alternating class, and has special reference to a type of armature adapted to generate currents for use in systems of distribution now known in the art as monocyclic systems, such as that described in the patent to Charles P. Steinmetz, No. 533,24l, and other patents issued to the same inventor. In such systems an electromotive force is maintained between two mains of an ordinary single-phase alternating system, while between those mains and a third main a displaced electromotive force is maintained by a separate coil, preferably upon the same armature, but which may be in other structures, as shown in other patents to the same inventor. My invention has, however, particular reference to that class of machinery in which both the main electromotive force and the displaced electromotive force are generated in the same armature, which is provided with a winding adapted to generate single-phase alternatin g electromotive forces and with a second or smaller winding connected to the middle point of the main winding, and nowcommonly called a teasenwinding It has for its object to provide a construction of armature adapted for rotation at high speed with safety and of great rigidity, strength, and compactness.

To the ends pointed out I construct my ar mature, primarily, of the usual iron pulley, carrying a spider upon its outer face, to which are secured the laminze of the core. These laminze are toothed for the reception of the coils, and the outer ends of the coil-chambers are formed with dovetails, permitting me to drive in wooden wedges to secure the coils iirmly in place. At each en d of the dovetailed groove I insert a wedge of brass or other metal, adapted to prevent the dislocation of the wooden wedges by any accident. In some cases I may also provide blocks, (preferably of wood, but which may be formed of other insulating materiah)4 which blocks are arranged to fill up the projecting ends of the coils, and over these blocks on the ends of the armature I place a brass sheathing-ring, secured by bolts in its place, thus giving a smooth outside finish to the armature. I also arrange the coil-chambers in a way best adapted to the placing of the coils therein, the smaller chambers, used for the teasercoils, being upon radial lines, while the larger chambers, used for the main generatd ing-coils, are parallel to the radial lines passing through the teaser-coil chambers. The convergence of the coil-chambers necessary to complete the circle of the core-disks is obtained by increasing that due to the central angle between the chambers of adjacent coils, while dispensing with these angles altogether between the chambers of the same coil. In some cases, however, I may arrange the coilchambers upon converging lines, although I do not consider this the best arrangement.

The accompanying drawings show embodiments of my invention.`

Figure l is a side elevation, partly broken away, of a portion of an armature constructed according to my invention. Fig. 2 is a side elevation of a portion of one of the laminze of the preferred form; Fig. 3, a similar view of another lamina of a different form; Fig. 4l, an enlarged detail showing one of the main coils in section 5 Figs. 5 and 6, perspective views of the insulating-blocks hereinbefore referred to; and Fig. 7 is a section upon the line 7 7 of Fig. 2, showing also the other parts of the armature with the coils and the end plate C removed, Fig. 8 being an enlarged detail.

A is the main pulley of the machine upon which the armature is built. A is the keyway securing it to the shaft.

B B, dre., are the pulley-arms.

C is a spider of brass, composition or other diamagnetic meta-l, which serves to compress ,into place the laminze of the core, serving at one and the same time as spider and end plate. The portion of this spider adjacent to the core-plates is slotted, as shown at I-I, and it is provided with screw-holes h h, with which the` brass plate C' is secured to the spider by IOO bolts D D, registering with the screw-holes 7L. The bolts D D, as shown, are placed one upon each side of the driving-arms B B of the pulley.

E E are the main coils, and E' E are t-he teaser-coils, already referred to.

I is the insulation interposed between the coil ends and the end plate.

K K are the leads from one of the main coils to the other, respectively.

G G/ are the dovetailed spaces in the coredisk slots, and g g are the trapezoidal wedges used to secure the coils in place.

At Q Q, I show the end connections of the coils from which the connections to the collector-rings are taken. Upon studs O O, forming part of the spider C and afiixed to said studs by bolts I?, is an internal shuntwinding carried with the armature and serving as a path for the portion of the current not used in compounding the machine. This, however, is not my invention, and I make no claim to the same herein.

At F O', respectively, I illustrate two wooden blocks in position to protect the coils, the blocks themselves being best shown in Figs.` 5 and G.

Referring now to Fig. 2, I illustrate the construction of one of the core-disks. L is the body of the disk. Z Z are the parallel slots for the reception of the main coils, and Z is the slot for the reception of the teaser-coil. As illustrated, the teaser-coil slot is central to a radius of the armature and the slots for the main coil are parallel to this radius and equidistant from it. It will be seen that this construction brings the entire angularity between two coils on the sides adjacent to one another, and the sides of the coils themselves may be parallel. This construction is interspersed regularly around the armaturethat is,there will be two coil-slots parallel to the radius through the teaser-coil slot-and each of these slots will be at an angle relative to the slot of the next coil greater than that of the radii passing through the central points of the coil-slots at the circumference of the laminae. At G G', I show the dovetailed arrangements in which the trapezoidal wedges are inserted to secure the coils in place. At L L are shown the keyways registering with keys upon the face of the spider, and adapted to furnish a driving-means for the laminae.

In Fig. 3 like parts are shown, the laminze being indicated at L2, and the coil-slots at Z2 Z3, respectively.

In Fig. 4 I show an enlarged detail, E being a section of the main coil, and L being a portion of one of the laminze.

Referring now to Figs. 5 and G, Iillustrate the shape of the blocks adapted to lit in between the ends of the coils and the core of the armature. O is one of such blocks provided with rounding ends o3 03, and a longitudinal groove oz upon its curved side. At 0 I show the transverse cut in the block adapted to fit under the main coil and to steady it in its position, at the same time steadying the smaller or teaser coil also. This transverse slot has also a rounded portion, as already indicated, to fit the main coil. In Fig. 6 the block F is provided also with a longitudinal groove f, fitting over the outside of the main coil, and provided with rounded corners f f, to accurately conform to its shape, and with arectangular cut f2, adapted to iit the teaser-coil:

The manner of assembling my improved armature is as follows: After the face of the pulley A is turned true the combined spider and end plate C is iitted to its place on one side. The core-disks are then assembled in registering position. The other spider is put in place, and the bolts D D are inserted, the whole being then compressed until the disks are locked firmly in their places. The smaller or teaser coils are then put in their places and connected, as shown, after which the larger coils are placed in the slots appropriated to them, the blocks O being put in place before the larger coils are inserted, and the blocks F afterward. The wedges g g are then driven in place in the dovetailed ends of the notches. I prefer in each case to insert in the end of each notch a small brass wedge of the same shape and size as the wooden wedges g g', for the purpose of making a good finish; but this is not material. This construction I illustrate in Fig'. 8, which is a face view of a small portion of the armature, and therein g g are the trapezoidal wooden wedges referred to, while the end wedges g2 g2 are supposed to be made of brass. The end ring C is then put in place and secured by the bolts DQ &c., after which the shunt-winding N is put in place, if it be used in the construction of the armature, though this also is optional. I may omit the blocks O F, and in practice it will be found best to do so in the larger sizes of armature, wherein the coils are of such size and are bound together so tightly that they are rigid enough to withstand any centrifugal action at their ends, the obj ect of the blocks O' F being to prevent the bending of the coil due to the centrifugal action and magnetic drag. Before the end ring C/ is put in place I balance the armature by putting in lead in the slots II of the end ring C, as indicated at h in Fig. l. By this means I obtain a very accurate balance, tending to prevent vibrations from eccentric revolution of the armature.

It is manifest that unimportant details may be varied without departing from my invention, and such variations I aim to embrace. The construction illustrated and described affords an armature of great mechanical strength and solidity, capable of withstanding high speeds when necessary without becoming distorted and without danger from centrifugal action.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

l. In a monocyclic armature, the combina- IOO IIO

IZO

tion of a core having notches of two different sizes, a series of main coils in the larger notches, and a second series of smaller or teaser coils in the smaller notches, one end of the series being connected to the middle of the series of main coils.

2, In a monocyclic armature, the combination of a core having notches of two different sizes, the smaller notches in line with radii of the armature, the pair of larger notches adjacent to alternate smaller notches being parallel to the radii passing through such alternate smaller notches, a series of main coils, each ot' such coils occupying a pair of the larger notches having parallel sides, and a second series of smaller or teaser coils occupying the smaller notches; an end of the series of teaser coils being connected to the middle of the series of main coils.

3. In combination, a pulley, as A, laminze for the core of the armature provided with notches as herein described, end-rings adapted to compress the laminae in place, bolts, as D, D, arranged upon either side of the pulley arms,adapted to secure the end rings to the pulley and to compress them so as to force the laminze together, a smaller coil, as E, and a main coil, as E, inserted in the notches ofl the laminze, and wedges, g, g', arranged to secure the coils in their places against centrifugal action.

4. As a newarticle of manufacture, a block O for the end of an armature coil, having rounding corners, 03,03, a longitudinal groove, o2, and a transverse groove, o, havin g a straight side and a rounding side, o'.

5. As a new article of manufacture, a block for the end of the coil in an armature, having a longitudinal groove f having a straight side and an opposite side having rounding corners, f, f', and a rectangular cut-away portion, f2, substantially as herein described.

C. As a new article of manufacture,a lamina for the core of a dynamo-electric armature, having notches for the coils, one of such notches being in line with a radius of the armature, and the two adjacent notches being parallel to the radius in line with the middle notch.

7. As a new article of manufacture,a lamina for the core of a dynamo-electric armature, having notches of two different sizes for the coils, the smaller notches in line with radii of the armature, and the two larger notches adjacent to alternate smaller notches being parallel to the radius in line with the smaller notch.

8. As a new article of manufacture, a lamina for the core of a dynamo-electric armature having notches of two different sizes for the coils, the smaller notches being in line with radii of the armature, the larger notches adjacent to alternate smaller notches being parallel to the radii with which the smaller notches are in line, and those adjacent to the other smaller notches being at an angle to each other greater than that between the radii passing through their centers at the circumference of the armature.

9. As a new article of manufacture, a lamina for the core of a dynamo-electric armature, having notches of two different sizes for the coils, the smaller notches being in line with radii of the armature, the larger notches adjacent to alternate smaller notches being par allel to the radii with which such smaller notches are in line, and those adjacent to the other smaller notches being at an angle to each other greater than that between the radii passing through their centers at the circumference of the armature, and all of the notches being of dovetail shape at their outer ends.

10. As a new article of manufacture, an end-ring for the armature of a dynamo-electric machine, provided with slots or chambers for the insertion of material to balance the armature.

In witness whereof I have hereunto set my hand this 20th day of August, 1895.

Y HENRY G. REINF. Witnesses c B. B. HULL, A. F. MAC/Denain 

